The reliability of wind excited transmission tower-line system based on fuzzy performance level was actively investigated.The equivalent random static wind loads of tower-line systems were established firstly.Furthermore,the structural performance functions based on traditional performance levels and fuzzy performance levels were developed,re-spectively.Different types of membership functions were utilized to describe the structural fuzziness.A method for calcu-lating the fuzzy reliability and failure probability of transmission tower-line systems was proposed.A real tower-line sys-tem in southern areas was taken as an example to explore the structural wind resistance reliability based on fuzzy perform-ance level.The effects of fuzziness coefficient and membership function on the wind resistance reliability of structures were investigated through parameter research,providing reference for the structural wind resistance design.
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